Description
About Rev0000
Rev0000 is a minor hardware change which eliminates the need for two bodge wires to set band rate . It includes the benefits of Rev000 which did away with the tape circuit and moved to a ROM for bootstrapping HDB-DOS, similar to a “minimal” Rev00 build and bootstrapping via a CocoSDC or other ROM cart. Since it is now a cartridge format, you no longer need to power the ESP32 via USB, and instead it will normally take 5V from the cartridge port. There is a diode so if you do want to power by USB for debug logging or other reasons it is safe to do so without backfeeding into the Coco.
We build the CoCoFuji using the ESP32-DEVKITC-VIE and an external antenna (The antenna is external to the PCB, but still fits within the cartridge.)
About Firmware and ROM
The ESP32 runs FujiNet Firmware. In addition, a ROM provides HDB-DOS Drivewire 3.
The DIP switch allows you to select one of four 16K ROM images from the EEPROM. The ROM contains pre-compiled images for Coco 1, 2, and 3 of hdbdos-snapshot20190324 as well as a diagnostics ROM from the Color Computer Archive.
ROM | Baud | SW1-1 (A14) | SW1-2 (A15) |
---|---|---|---|
hdbdw3cc1.rom (CoCo 1) | 38,400 | ON | ON |
hdbdw3cc2.rom (CoCo 2) | 57,600 | OFF | ON |
hdbdw3cc3.rom (CoCo 3) | 115,200 | ON | OFF |
Diagnostics v2.0 (1982) (26-3019) (Tandy)* | N/A | OFF | OFF |
*Note: Booting diagnostics from the ROM requires shorting J1 on the printed circuit board. A better way is to leave J1 as it is and boot your CoCo from the normal 1, 2, or 3 DIP setting. Then run this from the BASIC prompt: EXEC &HC000″ on CoCo 1+2, or “EXEC &HE010” for CoCo3.
Note: The 3D printed parts used in FujiNet are not like injection molded parts. I strive to produce good quality prints but some may show extrusion rings, artifacts, blemishes and other signs of plastic extrusion.
SD card must be formatted FAT32 (exFAT is not supported). Here is a Windows GUI FAT32 format utility: ridgecrop.co.uk/index.htm?guiformat.htm
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